Millie Bobby Brown Shows Off Stretchy Underwear That's 'Fun In The Back'

Millie Bobby Brown is giving SKIMS mogul Kim Kardashian a run for her money as she promotes her new Florence by Mills Fashion line. Going full-throttle in a new Instagram video this week, the 20-year-old debuted the Intimates collection from her 2024-founded brand, urging fans to shop her comfy-looking undies while also modeling items from her range. Showing off her killer abs in a teeny crop top and briefs, Millie walked fans through what her Intimates offer, and when it comes to the thongs, they're "fun in the back."

Scroll for the video, one coming only 24 hours after Millie celebrated being braless in her new Sunburst collection. Addressing fans as she continues to make headlines for her blended British/American accent, Millie posed in the Softy Seamless Baby Tee and Shorts as she offered a "look at the Intimates Collection."

Rocking a skintight crop top in slate blue, the Stranger Things star flashed her curves through those skintight fabrics, once again ditching the bra as she displayed her impressive ab muscles and toned legs. Adding a pair of coordinating shorts that hugged her curves, the British sensation said this was "the most comfortable thing I've ever put on."

Approaching the camera as she sported her locks down and went bold in red lipstick, Millie touched on her acting career, stating that wearing "costumes a lot on set" had wet her appetite for "something comfortable." She then pulled out the teeniest thong, showing off its stretchiness while saying that the briefs offer "coverage" where needed. However, they're "fun in the back!" Here, Millie Bobby Brown turned the underwear around, showing just how "fun" that thong can be. The actress even giggled before encouraging fans to give the Intimates collection a go.

"Underneath is what counts," she captioned the video, adding that the Intimates are now "here."

Millie has already made fashion headlines this summer for ushering in a new trend. Piggy-backing off the visible underwear trend that's been sweeping Hollywood, the newly married star got busy promoting her Garden Boxer Short. In June, she walked fans through the product while modeling a pair of printed boxers. "We all know it's the summer of boxer shorts.. own my perfect little cheeky pair now," she wrote, even throwing in a cheeky peach emoji.

Elsewhere, Millie Bobby Brown remains a talking point for her secret May wedding to 22-year-old Jake Bongiovi. Following the nuptials, fans got this gorgeous couple's shot as Millie called Jake her "forever wedding date." The couple got engaged in April 2023, but neither let slip that they actually had plans to walk down the aisle.